J.C. Penney Co Inc's stock hit a life-low as major store closures and a challenging retail scene drove the embattled department store chain to a bigger-than-expected quarterly loss and took a toll on comparable sales.

After Amazon.com Inc completes its takeover of Whole Foods, it might launch another brand with different standards, the grocery chain's chief executive said in remarks reported in a securities filing on Monday.

Macy's Inc margins could end the year as much as 80 basis points lower than in 2016, CFO Karen Hoguet warned on Tuesday in comments that sent shares of the department store chain sliding to five-year lows.